[interpreter] Add CreateCatchContext bytecode

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 1803 matching lines @@
 // Creates a new context with number of |slots| for the function closure.
 void Interpreter::DoCreateFunctionContext(InterpreterAssembler* assembler) {
   Node* closure = __ LoadRegister(Register::function_closure());
   Node* slots = __ BytecodeOperandIdx(0);
   Node* context = __ GetContext();
   __ SetAccumulator(
       FastNewFunctionContextStub::Generate(assembler, closure, slots, context));
   __ Dispatch();
 }
 
+// CreateCatchContext <exception> <index>
+//
+// Creates a new context for a catch block with the |exception| in register and
+// the variable name at |index| for and the closure in the accumulator.

[Michael Starzinger, 2016/08/18 15:00:42]

nit: Stray "for" in comment.

[klaasb, 2016/08/18 15:21:42]

Done.

+void Interpreter::DoCreateCatchContext(InterpreterAssembler* assembler) {
+  Node* exception_reg = __ BytecodeOperandReg(0);
+  Node* exception = __ LoadRegister(exception_reg);
+  Node* index = __ BytecodeOperandIdx(1);
+  Node* name = __ LoadConstantPoolEntry(index);
+  Node* closure = __ GetAccumulator();
+  Node* context = __ GetContext();
+  __ SetAccumulator(__ CallRuntime(Runtime::kPushCatchContext, context, name,
+                                   exception, closure));
+  __ Dispatch();
+}
+
 // CreateMappedArguments
 //
 // Creates a new mapped arguments object.
 void Interpreter::DoCreateMappedArguments(InterpreterAssembler* assembler) {
   Node* closure = __ LoadRegister(Register::function_closure());
   Node* context = __ GetContext();
 
   Label if_duplicate_parameters(assembler, Label::kDeferred);
   Label if_not_duplicate_parameters(assembler);
 
@@ skipping 416 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8